The dall flow tube is an empirical design with an extremely high pressure head recovery . Dall流量管是具有特别高的压头补偿的实验装置。
The method involves measurement of the volume of liquid, under constant head conditions . 这个方法，液体在恒定的压头下，测定液体的体积。
When the downstream head is greater than about 3/5 of the upstream head, flow is submerged . 当下游压头大于上游压头约35时，流量是潜流。
It is frequently referred to as "pressure head" when expressed in terms of energy per unit weight of water . 当以单位水重的能量来表达时，经常看作为“压头”。
Also, the difference in pressure between any two points in a bed is roughly approximated by the static head of bed between these points . 还有，床层中任意两点间的压差大致等于这两点间床层静压头。
The simulation and manufacture of the end cap pressure sensor 端盖压头仿真与研制
Inlet head of roof support ; assembly drawing , parts 屋顶支撑的入口压头.零件装配图
Verification regulation of spherical indenters for hardness testers 硬度计球压头检定规程
Anchor wires should have a spelter type socket at anchor side 抛锚绳靠锚的一端应使用锌压头
Verification regulation of diamond indenter 金刚石压头检定规程
